Explicitly sets the currently focused cell to renderer.
This is generally called by implementations of
GtkCellAreaClass.focus() or GtkCellAreaClass.event(),
however it can also be used to implement functions such
as gtk_tree_view_set_cursor_on_cell().
Explicitly sets the currently focused cell to renderer. This is generally called by implementations of GtkCellAreaClass.focus() or GtkCellAreaClass.event(), however it can also be used to implement functions such as gtk_tree_view_set_cursor_on_cell().